Heady, Earl O. <br/><br/>
Resource productivity, returns to scale, and farm size 

 - USA  The IOWA  1956 
 - v, 205p. 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Farm management research
<br/><br/><label>Dewey Class. No.: </label>338.1  / H46R